[PATCH v12 0/3] add the GPMI controller driver for IMX23/IMX28

[Huang Shijie]

Hi Lothar,
> Hi,
>
> Huang Shijie writes:
>> Hi,
>>    add more CC.
>>> Hi,
>>>
>>> Huang Shijie writes:
>>>> The patch set is based on Artem's tree:
>>>> 	http://git.infradead.org/users/dedekind/l2-mtd-2.6.git
>>>>
>>>> The general-purpose media interface(GPMI) controller is a flexible interface
>>>> to up to several NAND flashs.
>>>>
>>>> The Bose Ray-Choudhury Hocquenghem(BCH) module is a hardware ECC accelerator.
>>>>
>>>> With the help of BCH, the GPMI controller can choose to do the hardware ECC or
>>>> not.
>>>>
>>>> This driver is a _pure_ MTD NAND controller driver now.
>>>>
>>>>
>>>> The driver depends on another GPMI-NAND device patch set, you can find them at :
>>>> 	[1] http://marc.info/?l=linux-arm-kernel&m=131416901319573&w=2
>>>> 	[2] http://marc.info/?l=linux-arm-kernel&m=131416912319668&w=2
>>>> 	[3] http://marc.info/?l=linux-arm-kernel&m=131416891119504&w=2
>>>> 	[4] http://marc.info/?l=linux-arm-kernel&m=131416896219539&w=2
>>>>
>>>> Test environment:
>>>> 	Using imx23 and imx28 boards for test.
>>>>
>>>> 	imx23 :
>>>> 	console=ttyAMA0,115200 mtdparts=gpmi-nfc:20m(boot),-(user)
>>>> 	Tested by USB boot and NAND boot.
>>>>
>>>>           imx28 :
>>>> 	#console=ttyAMA0,115200 root=/dev/mmcblk0p3 rw rootwait
>>>> 	Tested by SD card boot mode.
>>>>
>>> How did you perform your tests?
>>>
>>> I tried this driver on our TX28 board with the result that with
>> The nand conflicats with SD card1. You will get the DMA timeout if you
>> use it.
>> Do you use sd card0 or sd card1?
>>
> I'm using the SSP0 port.
>
>> BTW:I tested the gpmi driver with SD card0. It works fine.
>>
> What exactly did you do in your test?
> Can you try the concurrent 'dd' commands that I used?
I tested the following :
   #dd if=/dev/mmcblk0 > /dev/null

[943147.630000] mmcblk0: error -110 transferring data, sector 3972320, nr 256, cmd response 0x900, card status 0x80b00
[943147.640000] mmcblk0: retrying using single block read
[943158.250000] mmcblk0: error -110 transferring data, sector 3972480, nr 96, cmd response 0x900, card status 0x0
[943158.260000] end_request: I/O error, dev mmcblk0, sector 3972480
[943168.780000] mmcblk0: r/w command failed, status = 0x80900
[943168.790000] end_request: I/O error, dev mmcblk0, sector 3972481
[943168.790000] Buffer I/O error on device mmcblk0, logical block 496560
[943168.790000] end_request: I/O error, dev mmcblk0, sector 3972488
[943168.810000] Buffer I/O error on device mmcblk0, logical block 496561
[943168.810000] end_request: I/O error, dev mmcblk0, sector 3972496
[943168.810000] Buffer I/O error on device mmcblk0, logical block 496562
[943168.810000] end_request: I/O error, dev mmcblk0, sector 3972504
[943168.810000] Buffer I/O error on device mmcblk0, logical block 496563
[943168.810000] end_request: I/O error, dev mmcblk0, sector 3972512
[943168.810000] Buffer I/O error on device mmcblk0, logical block 496564
[943168.810000] end_request: I/O error, dev mmcblk0, sector 3972520
[943168.810000] Buffer I/O error on device mmcblk0, logical block 496565
[943168.810000] end_request: I/O error, dev mmcblk0, sector 3972528
[943168.810000] Buffer I/O error on device mmcblk0, logical block 496566
[943168.810000] end_request: I/O error, dev mmcblk0, sector 3972536
[943168.810000] Buffer I/O error on device mmcblk0, logical block 496567
[943168.810000] end_request: I/O error, dev mmcblk0, sector 3972544
[943168.810000] Buffer I/O error on device mmcblk0, logical block 496568
[943168.810000] end_request: I/O error, dev mmcblk0, sector 3972552
[943168.810000] end_request: I/O error, dev mmcblk0, sector 3972560
[943168.810000] end_request: I/O error, dev mmcblk0, sector 3972568
[943179.450000] mmcblk0: error -110 transferring data, sector 3972480, nr 8, cmd response 0x900, card status 0x80b00
[943179.460000] mmcblk0: retrying using single block read
[943189.990000] mmcblk0: error -110 transferring data, sector 3972480, nr 8, cmd response 0x900, card status 0x0
[943190.000000] end_request: I/O error, dev mmcblk0, sector 3972480
[943200.530000] mmcblk0: r/w command failed, status = 0x80900
[943200.530000] end_request: I/O error, dev mmcblk0, sector 3972481
[943200.530000] quiet_error: 3 callbacks suppressed
[943200.530000] Buffer I/O error on device mmcblk0, logical block 496560
dd: /dev/mmcblk0: Input/output error
root at freescale ~$
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It seems only test the SD card also can reproduce the same DMA bug.

Best Regards
Huang Shijie

>
> Lothar Waßmann